APSL Systems offers an extensive range of Solid-Liquid Desanding Hydrocyclones for Produced Water, Seawater, Gas and Multiphase applications including High Pressure Pre and Post Choke Wellhead applications.



Solid-liquid desanding hydrocyclones offer a means of removing particulates from multi-phase, gas and produced water streams. Common oilfield applications include:  

  • Pre-choke Protection; Choke valves can be protected from erosion by removing solids prior to the choke valve; the normal location for proppant removal applications.
  • Primary Separation Equipment Protection – Solids removal ahead of multiphase separation can prevent solids build-up in primary separation trains helping to maintain optimum separation performance.
  • Protection from erosion: Desanding hydrocyclones can be used as part of the produced water train to limit the potential for erosion of downstream equipment such as deoiling hydrocyclones, control valves and piping where high velocities prevail.  This prolongs equipment life and helps to maintain optimum equipment performance.
  • Produced water re-injection: If solids are to be re-injected into the reservoir and there is a specification on the maximum particle size or TSS that the reservoir can tolerate, produced water desanders are suitable for removing sand and scale particles typically down to the 5 micron range.
  • Sand Cleaning: Once sand has been collected in a system, desanding hydrocyclones can be used to clean oil from the sand prior to disposal overboard or for landfill.



Key Features & Benefits


APSL's Solid/liquid hydrocyclones enable sand and solids to be efficiently and reliably separated from multi-phase, gas & produced water streams.

They have proven to be a valuable part of many oil and gas production facilities due to:

  • Their compact, small footprint
  • Cost-effective protection against erosion
  • No moving parts, minimal maintenance
  • Broad range of particle removal from 5 microns to mm
  • High efficiency of solids removal
  • Availability of erosion resistant materials (e.g. alumina ceramic / tungsten and silicon carbide)

Hydrocyclone Design

APSL alumina ceramic Uni-Spin multi-cyclone desanding hydrocyclone (desander) pack

APSL's cyclone liner size and type selected is dependent on the process fluid, temperature, pressure and the concentration, size and type of solids present in the fluid (gas and/or oil and/or water).  To remove small particles (sub 30 micron range), small diameter (typically 50mm and below) cyclones are required.  To provide the high flow capacity typically encountered in production systems, multiple desanding hydrocyclone liners are packaged together in one or more pressure vessels.  APSL has a range of desanding cyclone liners with diameters from 12mm up to 100mm in its multi-pack liner range.

Small diameter (12 to 100 mm), high efficiency desander cyclone liner are typically made of ceramic materials to provide excellent erosion resistance.  If the particles to be removed are in excess of 50 microns then the use of single large diameter hydrocyclones (>150mm) becomes an option. The larger diameter desanders have a much greater flowrate for a given pressure drop. Single high capacity desander cyclones are typically made of corrosion resistant materials as the base material with either tungsten carbide or silicon carbide coatings applied to the wear surfaces.

The desander pressure vessels can be designed for any ANSI or API pressure rating and to any recognised oilfield pressure vessel design code. The pressure vessel housings are available in a wide range of materials including lined carbon steel, duplex and super duplex, but other alternative exotic materials are also available.  

Hydrocyclone Retrofits, Upgrades, Spare Parts and Service

APSL single body Uni-Spin high performance wellhead/well stream desanding hydrocyclone liner

 APSL offers a complete range of services to upgrade and retrofit existing equipment, regardless of its original supply, to enhance flow, performance, materials, reliability, operability, maintainability and / or longevity.

With APSL’s know-how and design capabilities we can offer upgrades for most applications utilising the unique features of ASPL’s own technology or to review and improve existing equipment designs.

Our upgrade services include all necessary activities from inspection of existing units through to design, fabrication and installation to meet with our customer’s requirements. Trial site evaluation units are also available if required.

APSL's Other Solid Handling Products

Twin-Spin Slurry Jet

APSL high performance Twin-Spin Slurry-Jet solids hydotransport (jetting) unit.

APSL's unique Twin-Spin Slurry Jet is an internal fluidisation nozzle used to effectively remove solids from sand accumulators and other process vessels such as primary three phase separators and allows higher solids concentrations to be removed compared to other conventional jetting systems reducing flushing water flows and volumes. 

APSL Sandbagger

APSL SandSack slurry collection and transport unit

APSL's unique Sandbagger unit provides various solutions of transporting the removed solids without the bulk volumes of flushing water. Designs are available as either open vented units or completely sealed units such that all applications can be catered for. APSL's Sandbagger Plus system, incorporates features to reduce water consumption for remote wellhead applications for instance.

Sand Cleaning Systems

APSL desanding hydrocyclone and sand cleaning unit

APSL provides bespoke Sand Cleaning Systems to remove hydrocarbons from the removed solids in order to allow the bulk solids and flushing water to be disposed overboard avoiding the need for transportation of the solids to shore based facilities.